How do you use the mean value theorem to explain why (-1) is the only zero of the function f(x)=x³+3x²+9x+7?
1 Answer
Feb 23, 2017
Please see below.
Explanation:
If there were another zero, say at
then we could apply the mean value theorem on the interval
to conclude the=at there is a
But
Therefore, there cannot be two zeros of